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Unit 4

Evolution

TermDefinition
Theory Explanation supported by lots of evidence
Evolution How living things change over time
Homologous structures Structures that are similar because they were inherited from a common ancestor
Vestigial structures Strutures an organism has but does not use
Analogous structures Structures that are similar because of similar environmental pressures (NOT inherited from a common ancestor)
Comparative biochemistry comparing the DNA or proteins from different organisms to determine how closely related they are to one another
Comparative anatomy comparing the body parts of different organisms to determine how closely related they are to one another
Phylogeny evolutionary tree diagram
Age of the earth 4.5 billion years old
Fossil Any preserved body part, excrement, or impression of an organism that lived in the distant past
Created by: cesjds
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